屏蔽球对500 kV SF_(6)电流互感器内部电场分布影响研究  

Study on the Influence of Shielding Ball on the Internal Electric Field Distribution of 500 kV SF_(6) Current Transforme

作　　者：张宏伟 ZHANG Hongwei(State Grid Gansu Electric Power Company Jinchang Power Supply Company,Jinchang 737100,China)

机构地区：[1]国网甘肃省电力公司金昌供电公司,甘肃金昌737100

出　　处：《农村电气化》2024年第3期55-59,共5页Rural Electrification

摘　　要：文章通过分析LVQHB-500W2型500 kV复合绝缘SF_(6)倒置式电流互感器故障现象、类型和原因,研究了屏蔽球对该型号电流互感器盆式绝缘子局部电场强度的影响,提出了改进措施和防范策略,为保证该型号及类似电气设备科学设计和安全运行提供借鉴。The intermediate screen of LVQHB-500W2500 kV composite insulation SF_(6) inverted current transformer and the basin insulator are connected by bolts,and shield balls are installed on the bolts.When the shield balls at this position are loose or fall off,the bolts will be exposed,which will seriously affect the distribution of electric field and cause flashover and discharge on the surface of the basin insulator.By analyzing the fault phenomena,types and causes of this type of current transformer,this paper studies the influence of shielding balls on the local electric field strength of the basin insulator of this type of current transformer,and puts forward improvement measures and prevention strategies,which can provide reference for ensuring the scientific design and safe operation of this type and similar electrical equipment.

关 键 词：超高压设备 SF_(6)气体绝缘设备 电流互感器 电场分布 

分 类 号：TM854[电气工程—高电压与绝缘技术]